if ( window.addEventListener ) {  
  var state = 0, konami = "38,38,40,40,37,39,37,39,66,65", heap=[];
  window.addEventListener("keydown", function(e) {  
    heap.push(e.keyCode);
   if(heap.slice(-10).join(",")==konami ){    
 	var elms=document.getElementById("bott").style
       elms.display=(elms.display=="block")?"none":"block";
   }
    }, true);  
}